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Measurement of Core Body Temperature Using Graphene-Inked Infrared Thermopile Sensor

Measurement of Core Body Temperature Using Graphene-Inked Infrared Thermopile Sensor

Jorge S Chaglla E, Numan Celik, Wamadeva Balachandran

Sensors (Basel). 2018 Oct 3;18(10):3315.

PMID: 30282932

Abstract:

Continuous and reliable measurements of core body temperature (CBT) are vital for studies on human thermoregulation. Because tympanic membrane directly reflects the temperature of the carotid artery, it is an accurate and non-invasive method to record CBT. However, commercial tympanic thermometers lack portability and continuous measurements. In this study, graphene inks were utilized to increase the accuracy of the temperature measurements from the ear by coating graphene platelets on the lens of an infrared thermopile sensor. The proposed ear-based device was designed by investigating ear canal geometry and developed with 3D printing technology using the Computer-Aided Design (CAD) Software, SolidWorks 2016. It employs an Arduino Pro Mini and a Bluetooth module. The proposed system runs with a 3.7 V, 850 mAh rechargeable lithium-polymer battery that allows long-term, continuous monitoring. Raw data are continuously and wirelessly plotted on a mobile phone app. The test was performed on 10 subjects under resting and exercising in a total period of 25 min. Achieved results were compared with the commercially available Braun Thermoscan, Original Thermopile, and Cosinuss One ear thermometers. It is also comprehended that such system will be useful in personalized medicine as wearable in-ear device with wireless connectivity.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS71428	3D printing graphene ink			Price

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